College of Sciences, Northeastern University, Shenyang, People's Republic of China.
Nanotechnology. 2011 Jun 3;22(22):225502. doi: 10.1088/0957-4484/22/22/225502. Epub 2011 Apr 1.
Extremely high sensitivity and low working temperature of gas sensors are realized from SnO(2)/α-MoO(3) heterostructure nanobelts. Their sensitivity against 500 ppm ethanol is up to 67.76 at the working temperature of 300 °C, which is higher than that of bare α-MoO(3) and SnO(2) nanostructures. Also the working temperature can be lowered down to 120 °C. Such behaviors are attributed to the variation of the junction barrier at the SnO(2)/α-MoO(3) interface. The present results imply that heterostructured 1D nanomaterials may yield gas sensors with improved characteristics, and can be applied to a wide range of gas sensors.
SnO(2)/α-MoO(3) 异质结构纳米带实现了气体传感器的超高灵敏度和低工作温度。在 300°C 的工作温度下，它们对 500ppm 乙醇的灵敏度高达 67.76，高于裸 α-MoO(3)和 SnO(2)纳米结构。此外，工作温度可以降低到 120°C。这种行为归因于 SnO(2)/α-MoO(3)界面处结势垒的变化。目前的结果表明，异质结构 1D 纳米材料可能产生具有改进特性的气体传感器，并可应用于广泛的气体传感器。
